LM317 with pass transistor circuit regulators | ElecCircuit
This circuit is using LM317 with a pass transistor circuit for 5 important reasons. First, it is a high-quality power supply. Second, the output current is up to 3A. Third, adjust the output voltage of 1.25V to 20V. Fourth, adjust the voltage in the step of 3V, 6V, 9V, 12V. Finally, use a normal component, LM317, 2N3055, and more.